Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Andrew County | 1 | 2 |
| Audrain County | 0 | 0 |
| Barry County | 2 | 6 |
| Benton County | 6 | 54 |
| Boone County | 8 | 31 |
| Buchanan County | 1 | 3 |
| Butler County | 4 | 41 |
| Callaway County | 7 | 79 |
| Cape Girardeau County | 1 | 7 |
| Carroll County | 1 | 2 |
| Carter County | 2 | 11 |
| Cedar County | 6 | 73 |
| Chariton County | 1 | 3 |
| Christian County | 5 | 12 |
| Clark County | 4 | 22 |
| Clay County | 13 | 51 |
| Cole County | 2 | 6 |
| Cooper County | 3 | 12 |
| Crawford County | 3 | 7 |
| Dade County | 2 | 3 |
| Daviess County | 1 | 1 |
| Franklin County | 5 | 11 |
| Gasconade County | 2 | 4 |
| Gentry County | 2 | 3 |
| Greene County | 6 | 7 |